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发明名称
摘要
申请公布号
JPS552404(Y2)
申请公布日期
1980.01.22
申请号
JP19770064052U
申请日期
1977.05.19
申请人
发明人
分类号
G02C5/12;G02C7/06;(IPC1-7):G02C5/12
主分类号
G02C5/12
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